I have run into a problem with the latest alpha 23 version.

I am unable to add privileges to any of the groups in any category, I simply am greeted with error: "invalid-group-name". Here is that part from the log:

27/1 01:09:07 [150] - error: [groups.join] Could not create new hidden group: [[error:invalid-group-name]]

I am also unable to change any of the plugins settings, it says saved, without any errors, but they don't get saved.